Rotary pump or motor.



N0. 688,6l6. Patented Dec. l0, I90l.

A. FERGUSON. ROTARY PUMP 0B MOTOR.

(Application filed Oct. 9, 1900.)

([40 Model.) 2 Shaets-Sheet I.

No. 688,616. Patented Dec. 10, I90l.

A. FERGUSON.

ROTARY PUMP 0R MOTOR.

(Application filed Oct. 9, 1900.) (No Model.) 2 Sheets-Sheet 2.

UNITED STATES PATENT 01111013.,

'ALLEN FEReUso-n, or 1,000 SPRINGS, InAno, ASSIGNOR or THREE-renews 'ro BENJAMIN e. MULLINS, or BLISS, IDAHO. Y

ROTARY PU M P on Moron;

SPECIFICATION forming part of Letters Patent 120,688,616, dated December 10, 1901.

Application filed ctober9, 1900. Serial No. 32,622 (No model) i To all whom it may concern:

Be it known that I, ALLEN FERGUSON, a citizen'of the United States of America, and a resident of 1,000 Springs, Lincoln county, (l-Iagerman P. O.,) in the State of Idaho, have invented anew and useful Improvement in' Rotary Pumps orMotors, of which the following is a specification. 1 This invention relates to double-piston rotary pumps that are adapted to be used alternatively as hydraulic motors. I

The invention consists in certain novel features of construction involving peculiar combinations of parts hereinafter set forth and.

claimed.

The objects of the invention are to reduce to the utmost the wear of the working parts and to facilitate adjusting and replacing the same when worn, thus adapting the pump or motor to be advantageouslyemployed where the water to be propelld or utilized is liable to be Loaded with sand or grit,as in the operations of hydraulic mining.

Two sheets of drawings accompany this specification as part thereof.

Figure 1 of the drawings is a side elevation of the improved pump or motor in a form in which it has been practically 'used. I Fig. 2 is a central vertical section through the piston-casing and pistons. Fig. 3 is a front elevation'of one of the piston-blades. Fig. 4

' I represents a'cross-section of a piston-blade through either of its bolt-holes, and Fig. 5 represents a back view of one end of the blade.

Like letters and numbers refer to like parts I in all the figures.

In. the improved pump ormotor, as represented by Fig. 1, a three-part casing A is supported centrally upon a horizontal base 13, thetop of which is further provided with pillow-blocks C and D on the respective sides ..of the casing A to support a pair of rotary shafts 1 and 2 and with an additionalpillow block E at the power ordriving end or of the shaft 1. The power or driving end a: of the I shaft 1 may be connected with a suitable motor or with the machinery to be operated in any known or improved manner. 'The two shafts are connected with each other on, both sides of the casing A and-preferably beyond the pillow-blocks O and 'D by'spur-gearing 3 and 4 and extend through glands 5 and 0 and stufling-boxes 7 and-8 in the respective end plates a and b. of the casing A. The cas- 5 5 ing A and pillow-blocks C, D, and E are rigidly bolted to the base 13, and the caps c, d, and e of said pillow-blocksare removably held in place by bolts 9, 1-0, and 11, respectively.

. The glands 5 and 6 are adjustable by bolts 12 and 13, respectively, and the'endplates aand b are removably attached, respectively, by bolts14and15.

The water-chamber F, Fig. 2," within-the casing A communicates at top and bottom with the interiors of flanged necksf and g, which are coupled water-tight to pipes, (not shown,) either of whichmay bethe inlet-, pipe. Within said chamber F the pistons G and H,,Fig. 2, preferably of one and the same pattern, are keyed fast on theshafts 1 and 2, respectively, being constructed as follows: The body of each piston is a chambered castingliaving an axial bore 16 and a 'pair oflongitudinal chambers 17 with hand-holes 18 in both ends on opposite sides of said bore. Externally each piston-body is constructed with a pair of sunken sea-ts 19, and bolt-holes 20 extend with a slight slant from said seats through bosses within the chambers 17. The

bolts 21, Fig. 2, thus provided for are accommod ated by oifset bolt-holes 22, Figs. 3, 4, and 5, in piston-blades p, a pair to each piston, which are fastened in said seats 19 by means of said bolts 21 and project rigidly diametrically opposite each-other on each piston. Each of the blades 1) has a rectangular base 23, Figs. 3, 4, and 5, fitted to either of the thus concentric withits shaft. The face 25 of each blade is co'ncaved from the square edge of the base 23 to the peripheral surface 24, as shown in Figs. 2 and 4, and also from end to end, as shown in Fig. 3, sharp outer edges being formed at said peripheral surfaces, as shown at'26, Figs. 3 and 4, and also at both ends of each blade, as shown at 27 in Fig. 3. -'The back 28 is appropriately rounded. to adapt the blades to coact with rounded gaps q, Fig. 2, a pair of which are-formed in each piston diametrically oppositeeach other and substantially equidistant between the blade-seats 19 to coact with the blades of theopposing piston. I

Owing to the construction of the pistonblades 1), above described, as regards their concave faces and sharp edges 26 and 27, the improved pump'or motor is adapted to work with water carrying a large percentage of sand or grit with aminimum of wear, the

tendency of the blades to throw the sand or grit tangentially outward being thus effectively counteracted and also the tendency of the sand or grit to work in between the ends of the blades and the end plates a and b of the casing A. Wear of the pistonrblades exceeding that of the remainder of the pump or motor is, however, inevitable, and this is further provided for by elongating the bolt-holes 22 from front to rear, as shown in-Fig. 5, and by widening the blade-seats 19, so as to accommodate within them at the front of each blade a pair of adjusting-plates 29, Fig. 2, driven tightly into the seats 19. When itbecomes necessary to adjust the plates by setting them out, this is done by loosening the bolts 21, placing a thin sheet of metal under each blade, and transferring one of theadjusting-pieces 29 from in front of the blade to behind the same. The adjusted blade will then have the same relation to the matchinggap q as before its adjustment, while it willlbe tightened with reference to the coacting end of the chamber F concentric with the piston. Access to the'piston-blades and their appurtenances for such adjustment or for renewal is conveniently afforded by the removably-attached end plates a and b and by the hand-holes 18 in the ends of the chambered pistons. H

To prevent the piston blades p from compressing the water within the gaps q, thelatter are so formed that their walls touch the respective blades only at one point 30, Fig; 2, in each gap, being relieved from this point to the other extremity of the gap. The points of the blades do not touch within the gaps (1.

Employed as a pump the improved pump or motor receives the water through the neck f, and the pistons G.and H turn, respectively, in the directions representedby' the arrows 31 and 32 in Fig. 2.

In smaller sizes the piston-castings maybe solid except their axial bores 16, tap-bolts or screws taking the place of the bolts 21, and other like modifications will suggest themselves to those skilled in the art.

Having thus described said improvement, I claim as my invention and desire to patent under this specificationv 1. In a pump or motor, the combination with a casing comprising removably-attached end plates, a shaft and an opposing piston adapted to coact therewith, of a piston having a chambered body with hand-holes in its ends, pe-

blades having offset bolt-holes elongated from front to rear to receive said bolts, tially as hereinbefore specified.

ALLEN FERGUSON.

substan- Witnesses:

B. G. MULLINS, A. I. MoMAHon. 

